Problems of racial and social characteristics,
30.—Definition and description of variability of types,
31.
Differences between civilized and primitive members of
the same race, 39.—Problem of stability of type of the
human species, 41.—Evolution of human species,
41.—Problem of stability of races, 44.—Variations due
to changes in rate of growth, 45.—Arrest of growth,
49.—Variations not due to growth, 50.—Differences
between rural and urban types, 50.—Influence of
selection, 53.—Changes in bodily form of American
immigrants, 53.—Explanation of changes, 57.—Range of
changes, 63.—Changes of mental traits, 64.
Domestication, 65.—Changes due to environment,
70.—Changes due to selection, 72.—Changes due to
crossing, 73.